NEW YORK, April 27 (Reuters) - Wall Street gained more than 1% on Monday at the onset of a hectic earnings week, as investors turned a hopeful eye toward several U.S. states that are relaxing shutdown restrictions put in place to curb the spread of the COVID-19 pandemic.

All three major U.S. stock averages advanced, and are all now within 20% of their record closing highs reached in February, with the benchmark S&P 500 on track for its best month since 1987, after trillions of stimulus dollars helped U.S. equities claw back much of the ground lost since the coronavirus crisis brought the economy to a grinding halt.

But some analysts believe gains may be limited unless there is progress in finding treatments for the disease.

Several states have begun easing stay-at-home restrictions, in efforts to revive economies and get Americans back to work following crushing job losses.

“In general, I think the steps state governors are taking are the right ones and are measured and careful,” said Oliver Pursche, independent asset adviser in New York.

But Pursche cautioned against expecting a quick, ‘v-shaped’ economic recovery.

“If we start reopening tomorrow and there’s no big second wave of infections, I still think it’s 6 to 12 months at least until everything is back to normal,” Pursche said. “It’s much easier to hit ‘stop’ on an economy than it is to press ‘start.’”

Economists expect first-quarter U.S. GDP to have shrunk at a 4% annualized rate when the Commerce Department releases its report on Wednesday.

Market participants will also pay close attention to the U.S. Federal Reserve when it concludes its monetary policy meeting on Wednesday.

In afternoon trading, the Dow Jones Industrial Average rose 358.51 points, or 1.51%, to 24,133.78, the S&P 500 gained 41.74 points, or 1.47%, to 2,878.48 and the Nasdaq Composite added 95.64 points, or 1.11%, to 8,730.16.

All 11 major sectors of the S&P 500 closed higher, with financials, helped by rising U.S. Treasury yields, posting the largest gains.